Truck bolster



Aug. 2s, 1928.

J. A. LAMONT.

TRUCK HOLSTER` lpatented Auge. l l UNITED STATES .PATENT .o1-"Fics,

' center plate, anmanner their outer ends usually ports carried byVthetruck side frames andV one end o -supporting the JHN A. MONT, FUHICAO, ILLIN-OI-S,

' DBIES, 0I CBIIGAGO, A

conromrrou .or NEW-JERSEY.

j 'rntrcx noLs'rnn..

'Application med VIllarclx 23,

This inventionrelates to an improved bolster structure for railroad cartrucks', and more particularly to oneA which ,embodies the generalfeatures of the standard A. R. A. type and which is provided with aninternal' reinforcing `beam depending from the upper portion of thebolster underlying the to afford a support for the center plate.

Truck lboltsers of thistype are effect' supported atV boxV shapedgirders which are on resilient zsupare provided intermediate theirlength with a center plate which supports the Aload of the car.(Thestandard Albini,Y bolsters are constructed with upperv and lower webportions connected by side walls to form a recta ar beam, the lowermem'- ber being a tension meinberand the upper member being acompression member. ln order to provide suiiicient supportV beneaththecenter plate, various practices have been resorted to, in that somemeans are usually provided in addition to the upper web portion, thelower web portion and the side walls. ln some instances, it has been thepractice to provide a cylindrical` column beneath the center plateywhich forms a supporting column between the upper web portion andthelower web portion. Y

The present invention providesa structure in which the load imparted tothe center plate is more uniformly distributed through7 out the lengthof the bolster, and is one in which the load is imparted to thesidewalls, the upper web portion being provided with a reinforcing beambeneath the center plate which renders the structure strong Yenough tosupport the load without providing a supporting column for the centerplate Abetween the upper and lower web members'. The reinforcing" beamis in practice a U-shaped reinforcing beam having a bottom member andside walls formed integral withV the upper web portion of the bolsterstructure and forming therewith a secondary beam, the side walls beingspaced from the side walls of the bolster. f Y

The bottom member of the secondary beam which underlies the center plateis provided with a recess orpocket for engaging and king Pin! Y Anotheradvantage is that the various fea-M tures referred to above may beincorporated 1927. serial mi. iw'ass.

ASSINR TOQAIERIGAN STEEL FOUN- inabolster'structure `.of the standard A.R. e

partially in cross section to reveal theinternal structure, the figurelosing talren on the' line 2-'-2 as shown in Figure l; and Y Figure 3isa cross sectional view taken through the center of `the bolster.

The various novel fetures of the inve-n tion will be apparent yfrom thefollowing description and drawings, and will be particularly pointed outin the appended claims.

Referring to the drawing, it will be noted that my invention -isdisclosed in connection with a truck bolster designated generally as 10,which is provided with a top web portion ll and a bottom web portion l2and side 1 Walls 13. The outer ends of the bolster are provided withvertical ribs 14 which form the guiding slots 15 for engagement with theY guldeway provided in the side frames ofthe car truck not disclosed.The upper web portion is provided with openings i6 on opposite sides ofthe center, and `the bottom Vweb portion with openin s l? Aon oppositesides, suitably reinforced y Icircumferential flangesl and 19respectively. ln the rnid-A y dle portion of the upper web, the centerplate 20 is provided which consists of an upstanding circumferentialange 2l and a center opening 22 which is adapted to receive the kingpin. The king pin opening is provided with flanges extending above andbelow the web as at 23 so that the king pin will have a bearing surfaceofl increased area.

The car bolster thus far described is of therstandard A. R. A. type andconstitutesY an' old structure in the art. ln addition to theelements'set forth, my invention jcon-v templates a .reinforcing beam depending'from the npperweb portion 11 and underlying the center plate 20,attention bemg directed to Figure 3 whereby it will be n oted Vthat thereinforcing-beam is 'formed 1ntegrally-with the upper web portion l1 andbottom web ,minates as at 32, whereby the reinforcing beam, it will benoted, constitutes a secondary beam support primarily for the centerplate whereby the bottom web portion 25 acts in the capacity of atension member, and the upper web portion, which is a portion of the web11, servesl as a compression member, the walls 24C being spacedlaterally from theside walls 13 of the bolster as shown in Figure 3, thewalls'24, however, diverging upwardly where they are united with theupper web portion. The upper web portion, by reference to Figure 3, ispreferably increased in thickness outwardly as shown at 29 so that extrastrength is provided in imparting and carrying the load from the centerplate to the side walls 13 of the bolster.

Also, in this construction the side walls act to deliver the load to thebottom web member' and in order to better provide for the distributionuniformly over the bottom area, the bottom web portion is thicker as at30 adjacent the point where it joins with the side wall', in which casethe central portion designated 31 may be reduced to a minimum. The sidewalls 24 of the reinforcing beam extend diagonally upward toward the topportion and join the top portion at a point adjacent the flange 18vwhich surrounds the opening 16, whereby ample strength is provided inthe bolster at a point substantially removed from the actual area of thecenter plate 20. It Will be noted that the 25 of the `reinforcing beamteropening 33 is provided to conform to the standard A; R.

A. construction.

From the above description, it will be readily recognized that I haveprovided a bolster which embodies all the features of the standard A.R.v A. bolster, and in addition is provided with a reinforcing beamunderlying the center plate which will provide suificient strength andserve asa support for the load carried by the center plate, and willserve to distribute the load equally throughout the entire bolsterstructure, the load being carried uniformly by the walls and upper andlower web portions throughout their entire length and in this way avoidany concentrated application of load.

I claim:

1. A railroad car truck bolster structure, comprising an upper webvportion andside the cup portion having a hole 27 walls, and areinforcing beam having side walls depending from said web positionedbelow the center plate of said bolster,

2. A railroad car truck bolster structure, comprising an upper webportion and side walls, and an integral reinforcing beam having sidewalls depending from said web portion and positioned below the centerplate.

3. A railroad car truck bolster structure, comprising an upper webportion and side walls, and a reinforcing beam having side wallsdepending from and extending longitndinally4 of saidrweb portion,positioned under the center plate of said bolster and spaced laterallyfrom said walls.

4. A railroad car truck bolster structure, having a center plate thereonand comprising an upper web portion and side walls integral therewith,and a reinforcing beam having side walls depending from said web portionand underlying said center plate, said reinforcingbeam forming with saidweb portion a support for said center plate.

5. A railroad car truck bolster, comprising an upper web portion andside walls,

said bolster having a center plate carried by y said side walls, saidweb portion having a reinforcing beam depending therefrom andumlerlyingl said center plate, said beamhaving side walls and atensionmember.

6. A railroad car truck bolster, comprising an upper web portion andside walls, said bolster havingpa center plate carried by said sidewalls, said web portion having a reinforcing beam depending therefromunderlying said center plate 'and having side walls spaced from saidfirst named side walls;

-7. A railroad car truck'bolster, comprisilig an `ipper web portion andside walls, said bolster having a center plate carried by said sidewalls, said web portion havingv a reinforcing beam depending therefromunderlying said center plate, and spaced from said walls, said webportion between said reinforcing beam and said walls increasing inthickness toward said walls.

8. A railroad car truck bolster structure, comprising an upper webportion and side walls, a center plate formed on said bolster,

and a reinforcing beam depending from said web portion underlying saidcenter plate, said reinforcing beam hav-ing side walls spaced from saidfirst named side walls and aiding to support the load on said centerplate and also being provided withv anlo ening for receiving andsupporting the ring Y 9. railroad car truck bolster structure,comprising upper and lower web portions and side walls forming arectangular box shaped girder beam, a center plate on said upper webportion, a reinforcing beam underlymg said jcenterplate comprising alower portion and l web portion and side walls and forming with aportion of said upper web portion a second beam for supporting saidcenter plate.

10. A railroad car truck bolster having a 5 center plate on the topportion thereof, a

reinforcing beam depending from the under side of said center plate andforming a central support therefor, 'said center plate being;r carriedby the side walls of said bolster, and said reinforcing beam having sidewalls spaced from said first named side walls.

Signed at Chicago, Illinois, this 10th day of March, 1927.

JOHN A. LAMONT.

